Fun fact : There are schools of small fish in the pool. They hide among the many stones present at the bottom. It is quite funny to watch the otters try to catch them (without success).
This imo is one of the successes of the dome - I do like this exhibit and feel it was well executed. Maybe could do with an outdoor enclosure, but otherwise very nice. Would also love to see more otters join them given the size of the exhibit and the normal scale of a Giant otter family.